/**
 * Check for newer versions of mastracode on npm.
 */
export type PackageManager = 'npm' | 'pnpm' | 'yarn' | 'bun';
/**
 * Detect which package manager was used to install mastracode globally.
 *
 * Uses a multi-tier approach:
 * 1. npm_config_user_agent env var (set when run via `pnpm run`, `npm run`, etc.)
 * 2. npm_execpath env var (fallback for script-based invocation)
 * 3. NODE_PATH env var (set by pnpm global bin stubs)
 * 4. Resolved path of the running script (process.argv[1])
 * 5. Shell-out to `pnpm list -g` to check if pnpm manages the package
 * 6. Falls back to 'npm'
 */
export declare function detectPackageManager(): Promise<PackageManager>;
/**
 * Build the shell command string a user would run to install/update globally.
 */
export declare function getInstallCommand(pm: PackageManager, version?: string): string;
/**
 * Read the current version, injected at build time by tsup's `define` option.
 * Falls back to reading package.json at runtime (e.g. when running from source with tsx).
 */
export declare function getCurrentVersion(): string;
/**
 * Fetch the latest published version from npm.
 * Returns null if the fetch fails (network error, timeout, etc.).
 */
export declare function fetchLatestVersion(): Promise<string | null>;
/**
 * Simple semver comparison: returns true if `latest` is newer than `current`.
 * Handles standard x.y.z versions. Ignores pre-release tags.
 */
export declare function isNewerVersion(current: string, latest: string): boolean;
/**
 * Fetch the CHANGELOG.md for a specific published version from the npm CDN
 * and extract a human-readable summary of changes.
 * Returns null if the fetch fails or the changelog can't be parsed.
 */
export declare function fetchChangelog(version: string): Promise<string | null>;
/**
 * Extract the changelog section for a specific version and format it
 * as a concise bullet list suitable for terminal display.
 */
export declare function parseChangelog(markdown: string, version: string): string | null;
/**
 * Run the appropriate global install command to update mastracode.
 * Returns true on success, false on failure.
 */
export declare function runUpdate(pm: PackageManager, targetVersion: string): Promise<boolean>;
//# sourceMappingURL=update-check.d.ts.map